Combustion-engine.



No. 893,359. PATENTED JULY 14, 1908.

P, OTTESEN.

L CMKBUSTION ENGINE.

APILIC'AJIION FILED DEC. 20, 1907.

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WITNESSES 4 I INVENTOH Lanai-491%; gagammlixiiilfw U N ITED STATES PATENT OFFICE.

. FREDRIK OTTESEN, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO MESTA MACHINE COM- PANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

COMB USTION-ENGINE Specification of Letters Patent.

Patented July 14, 1908.

T 0 all whom it may concern:

Be it known that I, FREDRIK OTTESEN, a subject of the King of Norway, residing at Pittsburg, Allegheny county, Pennsylvania, have invented a new and useful Improvement in Combustion-Engines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a vertical section through the inlet gear of a gas engine combustion chamber, and illustrating one form of the invention; and Fig. 2 is a plan view of the main inlet valve.

This invention hasrelation to combustion engines, and more particularly to inlet valve gear therefor, the objects being to secure a better correlation of operations in the inlet cycle, to insure greater certainty and positlveness in operation, and to providemeans whereby the admission of the fuel which forms the basis of combustion may be controlled both as to quality and quantity.

The invention will be best understood by reference to the accompanying drawing, which will now be described, it being premised, however, that various changes may be made therein by those skilled in the art without departing from the spirit and scope of my invention as defined in the appended claims.

The numeral 2 designates the main cylinder of the engine, and 3 is the inlet port therefor. Seated on the cylinder 2 over the inlet port is a" cage 4 having formed therein the two annular chambers 5 and 6 separated by a horizontal partition 7.

8 is a gas supply passage communicating with the, chamber 5, and 9 is an air-supply passage communicating'with the chamber 6. The'inner wall of the chambers 5 and 6 is formed by, a sleeve or bushing 10 having sleeve or bushing 10.

16 is a springwhich normally holds the valve 13 seated, the valve being positively opened by means of the levers 17 and. 18

actuated by connection 19 witha cam or eccentric, (not shown) on a rotating part of the engine.

Within the sleeve or bushing 10 and se-- cured to the rod or stem 14 is a mixing valve 20, consisting of a hollow cylinder having a 'series of ports 21 which aredesigned to.-be

moved into register with the ports 11, and

two series of ports 22, which are designed to be moved into register with the respective ports 12. The valve 20 is rigidly secured to the rod or stem 14 so as to move up and down with the inlet valve 13, and is to be considered as positively operated. The ports in this mixing valve are so cut that the combined area of the gas and air passages is equal to the area of the inlet opening of the valve 13 at any point of the lift, thereby securing a suction pressure through said passages proportioned to the correspondingload. The gas and air 'assages 8 and 9 are respectively connecteii with gas and air supply pipes 23 and 24, a butterfly valve 25 being lnterposed in the connection between the pipe 23 and the passage 8, and a similar va vs 26 being interposed in the connection between the plpe 24 and the passage 9. The stems of the two valves 25 and 26 are connected on the exterior of the inlet passages by an adjustable link 27, which is attached to arms 28 on the respective stems or shafts and rigidly secured thereto. The stem or shaft of the valve 26 also has an arm 29 which is connected by a link rod 30 with a bell cranklever 31 actuated by the governor 32.

The operation is as follows :-The main valve 13, together with the ports 22 of the mixing valve open first, whl'e the exhaust valve (not shown), is still open, thus allowing a rush of fresh air to pass into and through the cylinder and scavenge it. As soon as the exhaust valve closes, the gas ports 21 on the mixing valve open, and mm this pointon both gas and air ass through the mixlng valve, becoming thoroughly mixed therein before enterin thec linder 2. time all the valves c ose and thecompression of the mixture takes place.

The invention provides means for obtaining both a quality and quantity regulation of the incomin as and a1r. By means of the adjustable l1n 7 connection 27 the relative Attheproper i i angles of the two valves can be varied, and a For this purpose, they are adjustably clamped on their stems as indicated at 33 in Fig. 1. In theposition shown in the draw ing, the gas passage is partially throttled, while the air passage is full open. The mixture is thus weakened giving'a quality regulation. Should the load on the engine further decrease, the governor will rapidly increase the throttling of the gas passage, and when this passage is almost closed, the valve 26 in the air passage will commence to throttle. The supply of both gas and air is now throttled, giving a quantity regulation.

The mixing valve 20 is formed with a number of helically directed vanes or interior 'Webs 20*, Which as the valve is moved act to cause a more thorough and intermediate commingling of the gas and air in a manner which will be readily understood. This is an important feature of my invention.

it will be readily seen that the point at which the air supply commences to be throttled may be controlled at will. It will further be noted that by the construction and arrangement of the mixing valve as shown rangement.

What I claim is 1. In a combustion en ine, an annular as chamber having an inlet eading to the cy inder, a reciprocating inlet valve for controlling said passage, and a mixing valve in said chamber working with the inlet valve, said mixing valve having a series of helically directed vanes or webs, together with separate gas and air inlet passages leading into the said chamber at different points; substantially as described.

2. In a combustion engine, an annular gas and air su ly chamber, a balanced mixing valve wor lng therein, means for ositively operating said valve, a main in ct valve working with the mixing valve, said mixing valve having interior helical vanes or webs, and separate gas and air supply ports leading into said chamber at diflerent points in the travel of the mixing valve; substantially as described.

3. In a combustion engine, a gas and air supply chamber, a reciprocating main inlet valve, a mixing valve arranged to reciprocate with the main inlet valve and having interior helical webs or vanes, and two sets of ports, gas and air supply passages leading into said chamber, independent valves' for controlling the gas and air supply, and a governor connection for control ing said valves; substanstantially as described.

In testimony whereof, I have hereunto set my hand.

FREDRIK OTTESEN.

Witnesses:

GEO. B. BLEMING, GEo. H. PARMELEE. 

